Steve on Image Processing with MATLAB

Image processing concepts, algorithms, and MATLAB

NaN Sightings

Some of us at MathWorks like to share our "NaN sightings." Here is an example to show what I mean. This is a screenshot of the tuner/metronome app that I use when practicing music. One day, I was a bit startled when the app suddenly decided that my metronome tempo was -NaN. (Am I playing too fast? No. Am I playing too slow? No. Am I playing at just the right speed? Also no.)

Here's another example spotted by a fellow MathWorker. In a town near my home, you can apparently buy a lawn tractor that has been driven NaN miles.

And a third MathWorker was helping a family member file their taxes and received this surprising summary of the results.

If you spot some amusing NaNs in the wild, let us know by posting a comment below. Include a picture if you like. (You might want to black out any personally identifying information before uploading a picture.)

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